User blog comment:Parinwaris/The Center Of Theories.../@comment-30134594-20171019130435/@comment-32853527-20171019150836

Actually here is my theory for Giratina

After you catch both Palkia and Dialga, a mysterious portal will open, you go through it and you'll be in the Distortion World, where like in Platinum, you need to solve some puzzles to get to where Giratina lies in wait...